I got tired of getting bit. These little fish can be straight up evil. LOL I started hand feeding years ago, and the aggression stopped. I have 7 clowns. All but two are mature, and have been with me for years. None of them bit me out of aggression. They will nip at me when I first put my hand in the tank, thinking I have food, but as soon as they realize I don't, they let me go about my business. There's a big difference between the little exploratory nibble looking for food, and the full on, I'll rip your are off, territorial attack.